safety rotational device is made of high-strength 7075 aviation aluminum-magnesium alloy, which has a longer service life. Passed 30 kN (6613 lbs) breaking strength test, industrial grade quality are strong and durable The swing swivel has the highest quality design, making the swivel rotator smooth and totally silent. Frictionless 360° free rotations with sealed ball bearings, which allow the rotor to easily maintain any high speed rotation and prevent the rope from rotating, kinking and shaking. No more twisted ropes or chains! This swing hanger is compact (2.17 x 4.25 inch), lightweight (only 4.94 oz only), which is very convenient for you to carry when going outdoors or camping. The swing spinner is very easy and reassured to use This swing spinner is designed for various rigging, hanging, and also ideal for climbing accessories. It is widely used in rescue, rock climbing, swing setting, hammocks, aerial yoga, children's swing spinner hanger and so on